Push sync works, pull sync does not

Also… here’s my config.json:

{
"log": ["*"],
"interface": ":4984",
"adminInterface": ":4985",
"databases": {
    "private": {
        "users": {
                "GUEST": {"disabled": false, "admin_channels": ["keys"] }
        },
    "server": "http://localhost:8091",
    "username": "private",
    "password": "password",
        "bucket": "private",
        "sync": ` function(doc, oldDoc) { channel(doc.channels); } `
        }
    }
}